Strategy11/display-widgets — pull request #18 by duckzland (2014-12-20 06:28:08+00:00)
Title: Use Taxonomy labels instead of machine name

Taxonomy machine name isn't always human readable, but their Labels (name, single, multiple etc) will always be and extra bonus is the label will most likely wrapped in translation function. so imo it is better to use the labels (name) for the checkbox label text.